Disconnecting choke-coil switch



June 3, 1930. p, BOLL ET AL 1,760,895

' DI SCONNEQTING CHOKE COIL SWITCH Filed Jl l'lyt 2?, 1927 Patented June3', 1930 PATENT OFFICE VL ESTER PIERCE BOLL, F MAPLEWOOD, AND ARNOLDCLEMENT HANSEN, JR., OF ST. LO'UIS, MISSOURI, ASSIGNORS T0 W. N.MATTHEWS CORPORATION, OF ST. LOUIS,

MISSOURI, A. CORPORATION OF MISSOURI DISCONNECTIHC-l CHQKE-COIL SWITCHApplication filed. July 27,

This invention relates to switches, and with regard to certain morespecific features, to choke coil switches for use in electric circuitsor lines.

Among the several objects of the invention may be noted the provision ofan improved switch incorporating in the disconnecting hinging elementthereof a choke coil; the provision of a device of the class describedin which the choke coil switch member may be readily removed forpurposes of repair; and the provision of hanger means for supportingsaid choke coil switch in combination I with a fuse switch or otherswitch element. Other objects will be in part obvious and'in partpointed out hereinafter.

The invention accordingly comprises the elements and combination ofelements, features of construction, and arrangements of parts which willbe exemplified in the structure hereinafter described, and the scope ofthe application of which will be indicated in the following claims.

In the accompanying drawings, in which are illustrated two of variouspossible embodiments of the invention,

Fig. 1 is a side elevation of one form of the invention;

Fig. 2 is a cross section on line 22 of Fig. 1;

Fig. 3 is an enlarged plan view of a hinge member; and,

Fig. 4 is an enlarged a contact assembly.

Corresponding reference characters indicate corresponding partsthroughout the several views of the drawings.

Referring now more particularly to Fig; 1, there is illustrated atnumeral 1 an 4 S-shaped channel iron support adapted to be fastened to across arm 3 by a shackle 5,

the legs of which shackle pass through the web of the channel support.The legs 7 and 9 of the support are of such length as to 45 holdinsulators'll, 13 and 15 sufiiciently far perspective view of 1927.Serial No. 208,709.

apart to permit the location of a choke coil assembly 17 and a fuseswitch 19, substantially as shown. The three insulators are held to thesupport 1, at each end and at the lower interior angle by means ofshackle clamps 21 and nuts 23. These insulators com-prise bell shapedporcelain bodies with grooves 25 adapted to receive the shackles 21. Tothe under sides of these insulators 11, 13 and 15 are aiiixed thebrackets 27, 29 and 31 respectively. These brackets comprise pieces ofchannel iron bent to the form shown or, if more easily fabricated, ironcastings. Their shape is indicated in the figure. In general, however,the lower end of bracket 31 should be lower than the corresponding lowerend of 29, and in like manner bracket 29 should be lower than bracket 27for ready manipulating purposes.

The bracket 27 is provided with a lug 33 adapted to support a contactingclip 35. Likewise, bracket 29 is provided with lugs 37 and 39 supportingcontacting clips 41 and 43 respectively and bracket 31 is provided witha lug 15 supporting a contacting clip 47.

Each contacting clip comprises a pair of cooperating U-shaped springmembers 49 held in contact with a terminal block 51 by means of a stud53 (Fig. 4). The stud 53 serves also to hold the clip-block assembly 49,51 to its respective arm 27, 29 or 31. Each inner spring member of thepair 49 is provided with a guiding flare 55. Below this flare is formeda pair of crimps 57 for purposes of holding the block or the like whichis adapted to be positioned between the tines of the inner springmember.

Between the clips 41 and 47 and their respective ears 37 and are clampedopen hinge members 59 and 61, respectively. These members 59 and 61 areheld in position by means of the studs 53 of the clip-block assembly.The member 61 is more particw larly detailed in Fig. 3. It comprises aflat portion 63 adapted to cooperate with the end of its supporting arm,in which portion is formed an opening 65 for the insertion of the stud53. A pair of wings 67 are provided to prevent twisting of the hingemember on its respective arm. Extending outwardly from said fiat portion63 is provided a pair of legs 69 having each a lost motion recess 71,adapted to receive certain gudgeon pins 73 formed with the fuses orswitch arms to be described.

In the lower pair of contacting clips 43 and 47 is removably mountedsaid fuse 19, which comprises, primarily, contacting blocks77 and 75formed and adapted to engage the contacting members 43 and 47 (to beresiliently held therein by means of the crimps 57). The blocks 7 5 and77 are mounted on an insulating tube 7 9 and are electrically connectedby means of a fuse wire 81 or the like which passes through said tube.The fuse wire 81 passes out of the lower open end of the block 75. Theblock 77 entirely encloses its end of the wire 81. A bridge portion 83is formed integrally with the block 77 for purposes of applying a toolthereto for removing and replacing the entire fuse block.

The upperpair of clips 41 and 35 together support said choke coil switchassembly 17. This assembly comprises, primarily, contacting blocks 85and 87 similar in construction to the corresponding blocks 77 and 75 inthe fuse assembly 19. The blocks 85 and 87 are adapted to engage thecontacting members 35 and 41 and adapted to be resiliently held in placeby means of the crimps 57 (see Fig. 4). The blocks 85 87 are mounted ona hardwood or other insulating bar 89. Aflixed to this bar 89 is a chokecoil 91. The turns of this coil are spaced and held in position byhardwood or other insulating material cleats 93 and 95, which comprisetwo pieces held together at intervals by studs 97. To firmly atfix thechoke coil 91 to the hardwood bar 89, a hardwood or other insulatingcleat 99 is affixed to said bar 89 withstuds 101, holding the coilfirmly between itself and bar 89.

The ends of choke coil 91 are fastened in clamps 103 and 105 (made of aconducting material), and are securely clamped by means of stud 109.These saddles 103 and 105 com- It is thus seen that the The clips 35 and41 may be from the upper ends of said recesses. Next the fuse or coil isswung upwardly into position, whereby the proper portions of the blocks75, 77 or 85, 87 are positioned between the tines 49 of the springcontacts. The lost motion recesses 71 permit of the proper amount of layrequired for properly positioning the use in its contacts and at thesame time permit of ready entry of the gudgeons 73 in their respectiverecesses. The line or other wires are put into electrical contact withthe fuse by fastening them at the screw sockets 107.

It is evident that the ridges 57 prevent either the fuse or coil fromfalling out of the clips. The supporting legs 69 prevent falling of thefuse or coil even though either should be loosened from its contacts bysome external force. The fuse, or coil, can only be removed from thehanger by manually and forcibly pulling it down and lifting it from themember 63. This comprises a controlled action, not one which would belikely to occur accidentally. \Vhen the fuse blows, burned gases and thelike are engendered and are projected from the lower open end thereof,with the result that there is a tendency for the fuse block to beprojected or rocketed upwardly and longitudinally out of the springclips. The reason for clearing the fuse of gases is not a part of thisinvention per se and is therefore not described in detail. With thepresent construction this projecting possibilit is guarded against,because the legs 69 o the hinge member are positioned across the path ofincipient movement of the gudgeons 73.

The purpose of the choke coil is to prevent the passage of undesirablehigh frequency surges, and to throw them back on the line where they aredischarged to the ground through a lightning arrestor (not shown). Atordinary commercial frequencies the choke has practically no retardingaction, and functions as an ordinary conductor. The fuse cartridgeprovides a further safeguard to the line. Both the choke coil and thefuse are easily removed from the supports, and new ones can equallyeasily be substituted therefor. The combination of fuse and choke coilcan be made in practically any size to meet any current or voltageconditions.

One of the primary features of the invention is the combination in asingle element of a choke coil and a disconnecting switch. Thesefeatures have been so combined that when the switch is opened, then thechoke coil is no more a portion of the line. The choke coil switch. maybe entirely removed by removing the gudgeon 73 from legs 69 after thecoil has been pulled down to open circuit position. This means that ifany repairs are needed on the choke coil itself, that it may be workedupon without being in proximity or connected with the voltage line. Thisis a distinct advantage.

It will be notedthat a bridge portion 83 is also provided for the chokecoil switch for the purpose of applying a tool thereto for re-' movingand replacing the coil switch.

In View of the above, it will be seen that the several objects ofthe-invention are achieved and other advantageous results attained.

As many changes could be made in carrying out the above constructionswithout departing from the scope of the invention, it is intended thatall matter contained in the above description or shown in theaccompanying drawings shall be interpreted as illustrative and not in alimiting sense.

We claim:

1. The disconnecting choke coil switch comprising line terminals, spacedterminal engaging elements at least some of which are adapted to engagesaid line terminals and at least one coil supported between two of saidterminal engaging elements and contacting them electrically, the supportfor said coil comprising insulating means between said two terminalengaging elements and within the coil adapted to hold said elements inspaced relationship, said two terminal engaging elements beingelectrically connected only through said coil,

2. In a disconnecting coil switch line terminals comprising conductingspring clips, spaced terminal engaging elements at least some of whichare adapted to engage said clips and at least one choke .coilelectrically connecting two of said engaging elements, said electricalconnection being the only one between said two elements, and a spacerbetween said engaging elements, said coil surrounding the spacers 3. Ina disconnecting coil switch line terminals comprising conducting springclips, spaced terminal engaging elements at least some of which are adated to engage said clips, insulating means or maintaining two ofsaidengagin elements in predetermined spaced relationship and a conductingcoil mounted on and around said insulating means and formin the onlyelectrical connection between sai two engaging elements.

4. The combination of a choke coil switch and a fuse switch comprising aframe, insulators afiixed thereto, brackets aflixed to the insulators,contacting clips on the brackets adapted to resiliently hold at leasttwo circuit closin' members, one of which comprises a fuse an the otherof which comprises a choke coil switch; open hinge members adapted topermit hinging application of the circuit closing members, removalthereof, and to prevent longitudinal movement thereof when positioned inthe said clips.

" 5. The combination of a choke coil switch and afuse switch comprisinga frame, insulators held thereto, brackets connected to the insulators,contacting clips fastened to the brackets adapted to resiliently hold atleast two circuit closing members, one of which comprises a fuse and theother of which com prises a choke coil switch, said fuse being held inwater deflecting position.

In testimony whereof, we have signed our names to this specificationthis 25th day of July, 1927.

LESTER PIERCE BOLL. ARNOLD CLEMENT HANSEN, J n.

